concision vs succinctness

concision and succinctness both are nouns.

Word	Noun	Adjective	Verb	Adverb
concision	Yes	No	No	No
succinctness	Yes	No	No	No

As nouns, concision and succinctness are synonyms defined as:

concision and succinctness: terseness and economy in writing and speaking achieved by expressing a great deal in just a few words

Other synonyms of concision include conciseness, pithiness.

concision (noun)	succinctness (noun)
terseness and economy in writing and speaking achieved by expressing a great deal in just a few words	terseness and economy in writing and speaking achieved by expressing a great deal in just a few words